Error codes are not channeled into warning and error...

[pykong]

... but are attached to lint message string.

This will prevent custom highlights with the upcoming release of SublimeLinter.
SublimeLinter/SublimeLinter#665

[braver]

@pykong if you can fix it I can merge it?

[arieltorti]

@pykong I cant test it right now but my changes should fix this.